Ted in NE-OH
Well-known Member
If a generator at a power plant generates a megawatt of power, what percentage gets lost in transmission to the user? Losses in wires transformers etc. Any factual data out there?
(quoted from post at 06:44:36 01/13/17) > And remember Edison wanted everything DC. Trouble is it goes flat in just a few miles. Tesla and Westinghouse got it right cause you can go hundreds of miles with very little lose. AC is actually power going back and forth like a pump in the wire so it is far more efficient. DC is just going in one direction so by the time it falls out of the end of the wire there is not much left. Kind of a strange way to describe it but is pretty close. Actually the water or plumbing way is how. Think of water hammering in a pipe. Bet there are other ways to describe this.
Hmm. Why is it then, that DC is used for long distance transmission lines? For distances over 300 miles DC is preferred over AC. DC transmission is more efficient at ALL distances, but the cost of the devices used to convert high-voltage AC to DC and back make DC impractical over short distances.
The advantage of AC is not that it is "power going back and forth like a pump in the wire". The advantage is it can be easily AND CHEAPLY converted to higher voltage and back to lower voltage. AC suffers from a number of losses to which DC is immune.
High voltage direct current power transmission
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